Remove debugmsg from guides

[Ivan Leo Murray-Smith]

> Please don't do that, we've been over this a thousand times,
> let's not rehash it. Do either or, otherwise you end up
> confusing Alexandre's script, etc. Inlining is prefered
> for a lot of reasons, so if you're using a decent mail client
> (and you seem to be), just inline it and don't look back :)
I'm not using an email client, my ESP only allows that if I connect via their
dial-up service. That's why I can't have text/plain attachments.

Ivan.